(function (factory) {
  if (typeof define === 'function' && define.amd) {
    define(['jquery'], factory);
  } else if (typeof exports === 'object') {
    // Node / CommonJS
    factory(require('jquery'));
  } else {
    factory(jQuery);
  }
})(function ($) {

	'use strict';

	var console = window.console || { log: function () {} };

	function CropAvatar($element) {
	    this.$container = $element;
	    this.$avatarView = this.$container.find('.avatar-view');
	    this.$avatar = this.$avatarView.find('img');
	    this.$loading = $("#page-wrapper").find('.loading');
	    this.$otherSrc = $("profile_img").find("img");
	    this.$avatarForm = $('.avatar-form');
	    this.$avatarUpload = this.$avatarForm.find('.avatar-upload');
	    this.$avatarSrc = this.$avatarForm.find('.avatar-src');
	    this.$avatarData = this.$avatarForm.find('.avatar-data');
	    this.$avatarInput = this.$avatarForm.find('.avatar-input');
	    this.$avatarSave = this.$avatarForm.find('.avatar-save');
	    this.$avatarBtns = this.$avatarForm.find('.avatar-btns');
	
	    this.$avatarWrapper = $('.avatar-wrapper');
	    this.$avatarPreview = $('.avatar-preview');

	    this.init();
	}

	CropAvatar.prototype = {
		constructor: CropAvatar,
		support: {
			fileList: !!$('<input type="file">').prop('files'),
			blobURLs: !!window.URL && URL.createObjectURL,
			formData: !!window.FormData
		},

		init: function () {
			this.support.datauri = this.support.fileList && this.support.blobURLs;

			if (!this.support.formData) {
				this.initIframe();
			}

			this.addListener();
			this.initPreview();
		},

		addListener: function () {
			this.$avatarInput.on('change', $.proxy(this.change, this));
			this.$avatarForm.on('submit', $.proxy(this.submit, this));
			this.$avatarBtns.on('click', $.proxy(this.rotate, this));
		},

		initPreview: function () {
			var url = this.$avatar.attr('src');

			this.$avatarPreview.empty().html('<img src="' + url + '">');
		},

		initIframe: function () {
			var target = 'upload-iframe-' + (new Date()).getTime(),
			$iframe = $('<iframe>').attr({
				name: target,
				src: ''
			}),
			_this = this;

			// Ready ifrmae
			$iframe.one('load', function () {

				// respond response
				$iframe.on('load', function () {
					var data;

					try {
						data = $(this).contents().find('body').text();
					} catch (e) {
						console.log(e.message);
					}

					if (data) {
						try {
							data = $.parseJSON(data);
						} catch (e) {
							console.log(e.message);
						}

						_this.submitDone(data);
					} else {
						_this.submitFail('Image upload failed!');
					}

					_this.submitEnd();

				});
			});

			this.$iframe = $iframe;
			this.$avatarForm.attr('target', target).after($iframe.hide());
		},

		change: function () {
			var files, file;

			if (this.support.datauri) {
				files = this.$avatarInput.prop('files');

				if (files.length > 0) {
					file = files[0];

					if (this.isImageFile(file)) {
						if (this.url) {
							URL.revokeObjectURL(this.url); // Revoke the old one
						}

						this.url = URL.createObjectURL(file);
						this.startCropper();
					} else {
						this.alert("不是图片文件");
					}
				}
			} else {
				file = this.$avatarInput.val();
				if (this.isImageFile(file)) {
					this.syncUpload();
				}
			}
		},

		submit: function () {
			if (!this.$avatarSrc.val() && !this.$avatarInput.val()) {
				return false;
			}
			var files = this.$avatarInput.prop('files');
			if(!this.isImageFile(files[0])){
				return false;
			}
			if (this.support.formData) {
				this.ajaxUpload();
				return false;
			}
		},

		rotate: function (e) {
			var data;

			if (this.active) {
				data = $(e.target).data();

				if (data.method) {
					this.$img.cropper(data.method, data.option);
				}
			}
		},

		isImageFile: function (file) {
			if (file.type) {
				return /^image\/\w+$/.test(file.type);
			} else {
				return /\.(jpg|jpeg|png|gif)$/.test(file);
			}
		},

		startCropper: function () {
			var _this = this;

			if (this.active) {
				this.$img.cropper('replace', this.url);
			} else {
				this.$img = $('<img src="' + this.url + '">');
				this.$avatarWrapper.empty().html(this.$img);
				this.$img.cropper({
					aspectRatio: 1,
					preview: this.$avatarPreview.selector,
					strict: false,
					crop: function (data) {
						data = data.detail;
						var json = [
							'{"x":' + Math.floor(data.x),
							'"y":' + Math.floor(data.y),
							'"height":' + Math.floor(data.height),
							'"width":' + Math.floor(data.width),
							'"rotate":' + data.rotate + '}'
						].join();

						_this.$avatarData.val(json);
					}
				});

				this.active = true;
			}
		},

		stopCropper: function () {
			if (this.active) {
				this.$img.cropper('destroy');
				this.$img.remove();
				this.active = false;
			}
		},

		ajaxUpload: function () {
			var url = this.$avatarForm.attr('action'),
				data = new FormData(this.$avatarForm[0]),
				_this = this;

			$.ajax(url, {
				headers: {'X-XSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')}, 
				type: 'post',
				data: data,
				dataType: 'json',
				processData: false,
				contentType: false,

				beforeSend: function () {
					_this.submitStart();
				},

				success: function (data) {
					_this.submitDone(data);
				},

				error: function (XMLHttpRequest, textStatus, errorThrown) {
					_this.submitFail(textStatus || errorThrown);
				},

				complete: function () {
					_this.submitEnd();
				}
			});
		},

		syncUpload: function () {
			this.$avatarSave.click();
		},

		submitStart: function () {
			this.$loading.fadeIn();
		},

		submitDone: function (data) {
			if ($.isPlainObject(data)) {
				if (data.result) {
					this.url = data.result;
					if (this.support.datauri || this.uploaded) {
						this.uploaded = false;
						this.cropDone();
					} else {
						this.uploaded = true;
						this.$avatarSrc.val(this.url);
           
						this.startCropper();
					}
					this.$avatarInput.val('');
				} else if (data.message) {
					this.alert(data.message);
				}
			} else {
				this.alert('Failed to response');
			}
		},

		submitFail: function (msg) {
			this.alert(msg);
		},

		submitEnd: function () {
			this.$loading.fadeOut();
		},

		cropDone: function () {
			this.$avatarForm.get(0).reset();
			this.$avatar.attr('src', this.url);
			/* 更新header内图片*/
			$(".user-icon").attr("src", this.url);
			this.stopCropper();
		},

		alert: function (msg) {
			var $alert = [
				'<div class="alert alert-danger avater-alert">',
				'<button type="button" class="close" data-dismiss="alert">&times;</button>',
				msg,
				'</div>'
			].join('');

			this.$avatarUpload.after($alert);
		}
	};

	$(function () {
		return new CropAvatar($('#crop-avatar'));
	});

});